depend of to many factors... distance from ground... ground configuration, earth natural disturbance...
but much better then one top quality dipole and also less then 2 way dipoles.
today wee need minimum 2 way or 4 way antenna sistem because rf jam is so high then was 25 years before...

I prefer dominator vector antena because hi get real gain easy to install. one antena like 2 way... but need the higher position... tower etc...

I always found that a quick twin-stack of dipoles worked well, and gave around 3.2 dBb if matched and assembled correctly. The "Dominator" claims 3 dBd. My ⅞-wave with four ¼-wave radials measures at just over 3.7 dBd, and has a nice low radiation angle - very little signal goes skyward.

Another aerial I've been playing with (at 430 MHz so it's a reasonable size to work on) is the 0.64-wave vertical. The match is tricky, but when it works, it's very useful....

I always found that a quick twin-stack of dipoles worked well, and gave around 3.2 dBb if matched and assembled correctly.

I wouldn't call a correctly assembled and matched double stack, "quick", especially one that gets close to 3.2 dBd!

The last one I built took much, much longer I had anticipated by the time I:

Messed around trying to find a combination of aluminium box section and brass tube that gave me the impedance match that I wanted. I had to obviously go by commonly available sizes of box section, not listed in inside dimension order (which is all I really cared about) and brass tube listed in different units to the aluminium box section, and not available everywhere easily - this took at least 2 hours of calculation, simulation, compromise and lots of searching around to get right.

Used a milling machine that didn't have enough axis travel to make a quarter-wave splitter from aluminium box section and brass tube in one setup.

Built the quarter-wave splitter.

Checked the matching and tuning of the splitter using a VNA and some 50 Ohm loads from a cal kit and then adjusted as required. Hint: if it's wrong, you've got to start again or magically figure out how to make obround tapped holes.

Tuned the dipoles. This took about 4 hours.

Made the three pieces of coax with N connectors and hex crimp ferrules including carefully shrinking glue-filled heatshrink over the crimp sections to make them waterproof. Tip: do not buy anything but Amphenol, Pasternack, etc. (high quality, known-brand) crimp-type N connectors as the crimp ferrules will not be the correct size. They will not work with the supposed correct crimp die size. Time wasted: about 4 hours milling very hard tool steel in order to make my own crimp dies on said milling machine in order to make the ferrules grip the coax.

Checked the tuning when spaced for optimum gain (about 0.925 wavelengths) and spaced from the mounting pole, and adjusted to suit.